Subject line

The text displayed at the top or beginning of an email, providing a concise summary and preview of the email's content. This line is visible in the recipient's inbox, influencing their decision to open or ignore the email.

Subject lines longer than 40 characters are often truncated on mobile and subject lines longer than 90 characters are often truncated on desktop. It's important to communicate to subscribers why they should open the email in less than 40 characters for best results.